Method of treating waste soapy liquors from laundries.



UNITED STATES PATENT OFFICE- t mwnnn WILLIAM LUCA-S,

or nnnrne, YENGLAZIN'D, nssrenon ro HOWARD r. nnmson,

OF SYRACUSE, NEW YORK.

METHOD OF TREATING WASTE SOAPY LIQUORS FROM LAUNDBIES.

1,245,605. No Drawing. I

serviceable for further cleansing operations.

According to my invention the waste li nor on being discharged from the last sium permanganate) w shing machine and while still hot is treated with a permanganate (e. g. potasa peroxid (e. g.hydroa perborate, a persulfate, a or other body capable of rapidly decolorizing and purifying the liquid, and then while still hot the liquor is filtered.

In carrying out my invention I may conveniently empty tank and while still hot add. the requisite proportion of purifying agent, for example potassium permanganate, sufiicient to decoloriz'e the liquor. For ordinary brownish colored soapy waste liquors, about 3; lb. of potassium perma, anate per 100 gallons of liquor will be su cient to efiect the purification, but for fouler waste solutions more permanganate will be necessary,.in some cases as much as 1; lb. or even a little more, per 100 gallons of liquor may berequired. In the presence of alkali which is always contained by the waste liquors in question oxygen is liberated by this (treatment and gen peroxid) ercarbonate,

' manganeseoxid thrown down. The liquor and easy while still hot is then filtered by means of a filter press or other convenient means.

By this treatment it is possible, in a cheap manner, to quickly remove a great proportion of colorizing matter dirt and offensive odor from waste laundry liquor Specification of Letters Patent."

' portions required vary from the waste liquor into a.

=liquors contain ng an ,of potassium in amount '-(2%) per cent.

Patented Nov. 6, 1917.

Application filed April 17, 1914.. Serial no. 832,669.

and-t0 render it fit for further cleansing v operations. My invention effects a considerable saving of soap, Washing soda and Water, and also of coal for heating the water. The operation of purizt'ying the waste liquor maybe repeated one or more liquids of the nature of hot laundry waste and although the purifying action is not so rapid as in the case of the two reagents first given they are of real service. The proto l per cent. Similarly percarbonates can be used in proportions varying from to 2 per cent.

'What I claim is:

1. A process for treating waste soapy liquors containing an alkali consisting in treating the waste liquor with an agent liberating oxygen alkali and then filtering the so-treated liquor to remove the impurities without separat ing the water from the soapy substance.

2. A process for treating Waste soapy alkali consisting in treating. the waste liquor with permanganate varying from one thirty-second (3 a) of one per cent. to tWo then filtering the so-treated liquor in order to remove the lmpuriti "ing the water from the soapy substance.

I EDWARD WILLIAM LUCAS. -Witnesses:

G. DONALD HARRISON, HERBERT D. JAMESON.

es without separattimes before allowing it ,to run finally to in the presence of such 7 of the treated liquor, and 

